Calling a generator function returns a generator object

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index a3163eb619c6d76ff18ab33db93ded19414542c3..982fcd9a2c111be911515a29c9238e22d03bb4d1 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -1286,6 +1286,10 @@ void JSObject::JSObjectShortPrint(StringStream* accumulator) {
       }
       break;
     }
+    case JS_GENERATOR_ITERATOR_TYPE: {
+      accumulator->Add("<JS Generator Iterator>");
+      break;
+    }
     case JS_MODULE_TYPE: {
       accumulator->Add("<JS Module>");
       break;
@@ -1542,6 +1546,7 @@ void HeapObject::IterateBody(InstanceType type, int object_size,
       break;
     case JS_OBJECT_TYPE:
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
+    case JS_GENERATOR_ITERATOR_TYPE:
     case JS_MODULE_TYPE:
     case JS_VALUE_TYPE:
     case JS_DATE_TYPE: